Matasaburo the Wind Imp (2003)

Each year, at the start of the fall school year in September, Japan suffers from typhoons. That same month, in a small elementary school in a mountainous region, Saburô, a new red-haired pupil has just arrived with the wind. The children of the village thought they recognized in this strange boy who came from the city the spirit that they called “Matasaburô, the wind”. During two weeks of autumn, Matasaburô and the other children will do various experiments in nature.

Unfortunately the movie Matasaburo the Wind Imp is not yet available on HBO Max.